Gas-engine.



UNITED STATES PATENT. OFFICE.

ENOCK NORRBOM, 0F BROOKLYN, NEW YORK.

GAS-ENGINE.

Specication of Letters Patent.

Patented Oct. 8, 1918.

Appucamn med .my 2o, 1917. serialNo. 181,743.

To all whom 'it may concern.'

Bc it known that I.' ENoCK onnoan. a citizen of the United States, and aresident of the city of New York, borough of Brooklyn, in the county of`Kings and State of New York, have' invented a new and -ImprovedGas-Engine, of which the following 1s n full, clear, and exactdescription.

This invention relates to internal combustion engines and 'hasparticular reference to improved facilities for more thoroughly purgingthe cylinder than is ordinarilycustomary. More definitely stated Iprovide a means in connection with the piston whereby a charge offreshair is take'n from or through the crank casing at each' upfstrokeof thew piston and on the succeeding. down stroke such charge of freshair is compressed and delivered into the main cylinder so that en theexhaust stroke said charge of fresh air serves to cleanse or purge thecylinder.

Tit-h the foregoing and other objects in View the invention consists inthe arrangementv and combination of parts hereinafter described andclaimed, and while the invention is not restricted to the exact detailsot admitted Ainto the crank casing. The-crank shaft 12 is journaledinthe casing'. as usual and has connected .thereto a, connecting rod.

A 13 having at-its' upper end a T-head 14.

I istV The piston 15 .reciprocates for the usual purposes in thecylindervl, butis 'peculiar the spurtingofthe 'fresh al1- in this manner-int-o the bottom cfthe activeportionofthe cylinder will thoroughlypurge the exhaust 1n having a downwardly projecting tubular cylinderextension 17 'having a smoothouter surface acting asa, piston 1n a,cylindricalboss 18 constituting a partof a base plate'19 i anchoredbetween the lower endfof thezcyl- 'nder 16 and the top ange 2() of thecrank casing. The Vpiston is centrally tapped at 21 tor'eceive thethreaded shank 22 of a two part anchor block 23 fitted-into'the interiorV of the extension 17;A This'block consists .of` two substantiallyequalparts, the' only d.1f-

then set up to tightenthe block in the pis- .vacuum forme by theup-'stroke of the pisf ton. When the piston makes its next downlowerlend of the cavityl'28 out t .or morejducts 31 into t *admission of fuelgases through the inlet port 33 it will be understood that such gaseswill be'suflicently rich to )ustify the dilution i ference beinglthatone is countersunk at y24 for the head of a. binding screw 25 extendingtherethrough into the other block part.

These block elements are provided with transverse registering bearingholes 26 into which the `ends of the T-head14 roject, the. T-head beingcylindrical and roc ing in the bearing holes in accordance with therotation of the crank. The'lowerends of the block" elements are cut awayat 27 to provide .a

clearance for the upper end of the connecting rod while making itsoscillation in the block 23. In assembling theseparts the block elementsare slipped upon the ends of the head`14: and 'clamped together by thescrew 25. The anchor block is then projected into its place in thepiston and relative rotation betweenthe piston and the 'anchor block isIton,` the conical surface of the anchor block acting to wedge' or bindsnugly into the pis# ton asa result'of the act-ion of-the threaded shank22. i

The construction of the cylinder and a'ssociated parts is such asjtoprovide as large a cavity aspossible at 28 'below the pistoxf into whicha charge of fresh. air is sucked 't from the crank casing through theopeningtff'. 29 in the boss 18, the air passing thenclrgA laterallythrough one or more ports 0A leiid ing into sraid cavity 28 justas thepistoi's completing its'up-stroke, this intlowof agir into, the 'cavit'28 being insured by the stroke the extension 17 promptly closes andseals the ports 30 and the piston compr the air trapped within thecavity 2,8. Yi

vthe iston, however, approaches the limit o itsV own-stroke Vasindicated in dotted lines in Fig. 2 the air trapped andi compressed gbelow the piston spurtsforcibl;

e cylinderabove the piston. If now. the exhaust'p'ort 32': is `opengases therefrom.- i. Duringthe subsequent re.;

fresh' air into the cavity28 `'and the deli-very thereof. into' theactive ortion of the cylinder will be repeated. ith .respect -tc the'105 ciproca-tions of the' piston this adnnssionof I i terialhy bec-anseof the utilization of the fresh air '1n-the ways above indicated.

I claim:

In a gas engine, the combination of a cylinder, a crank casing, means toconnect the crank casing to the cylinder, an annular baise plate securedin the lower end of the. cylinder at the place of @('n'inection betweenthe casing and the cylinder, said plate har in,r a central hollowcylindrical boss having' a lateral port therethrough to brin the crankcasing into communication wit the lower portion o1- the cylinder, apiston in the cylinder and having a cylindrical prof ject'ion fitted asa piston in said boss, said projection uncovering said lateral port whenthe piston is up and seavlimr said port when' the piston is 1 own and a(illictleading from 'the lower and of the cylinder to a pointlfarther upwhereby the air trapped Within the lower end of the cylinder andCompressed by the piston on its down stroke will be delivered into thevcylinder above the piston.

ENocK NoRRBoM.

